Chapter 2 Challenging the Boundaries between Classical and
... In the second and third part of his trilogy, Bohr displayed several models of multielectronic atoms and molecules. To test them with concrete experimental outcomes, he calculated the theoretical values of proper frequencies, using either the ordinary laws of mechanics or quantum postulates for the c ...
... In the second and third part of his trilogy, Bohr displayed several models of multielectronic atoms and molecules. To test them with concrete experimental outcomes, he calculated the theoretical values of proper frequencies, using either the ordinary laws of mechanics or quantum postulates for the c ...
Development of semi-classical and quantum tools for the
... Electronics surrounds many aspects of our everyday life. The progress of our actual society is somehow ultimately linked to the progress of electronics. Such progress demands smaller and faster devices. Therefore, the simulations tools needed to be able, to understand the behavior of emerging electr ...
... Electronics surrounds many aspects of our everyday life. The progress of our actual society is somehow ultimately linked to the progress of electronics. Such progress demands smaller and faster devices. Therefore, the simulations tools needed to be able, to understand the behavior of emerging electr ...
Text and script of the play "Incredible Quantum Tablet".
... It can be used as part of a complete stage design that includes the FrontBot, RigthBot and BackBot, as well as other props such as furniture or speakers or lab equipment. 2. RightBot is a vertical wall from playwood on roller wheels. It has some support so it can stand on its own vertically, but in ...
... It can be used as part of a complete stage design that includes the FrontBot, RigthBot and BackBot, as well as other props such as furniture or speakers or lab equipment. 2. RightBot is a vertical wall from playwood on roller wheels. It has some support so it can stand on its own vertically, but in ...
Jagiellonian University M. Smoluchowski Institute of Physics Entropy
... exist, of course, many interpretations and therefore, many kinds of information concerning this picture. However, nowadays we are willing to distinguish some sort of information necessary to communicate a message independently on the interpretation. Due to our experience with computers we are used t ...
... exist, of course, many interpretations and therefore, many kinds of information concerning this picture. However, nowadays we are willing to distinguish some sort of information necessary to communicate a message independently on the interpretation. Due to our experience with computers we are used t ...
What Makes a Classical Concept Classical? Toward a
... to Bohr’s words, and, at the same time, to make both physical and philosophical sense. At the heart of this reconstruction are proposals regarding both of the supposedly non-problematic issues: one regarding what it means to describe a system classically, and one regarding where a classical descript ...
... to Bohr’s words, and, at the same time, to make both physical and philosophical sense. At the heart of this reconstruction are proposals regarding both of the supposedly non-problematic issues: one regarding what it means to describe a system classically, and one regarding where a classical descript ...
Single component and binary mixtures of BECs in double
... density matrix N=50, epsilon=J/10^10 B. Juliá-Díaz, Trobades Científiques de la Mediterrània, Menorca, 2010 ...
... density matrix N=50, epsilon=J/10^10 B. Juliá-Díaz, Trobades Científiques de la Mediterrània, Menorca, 2010 ...
Transformations of Entangled Mixed States of Two Qubits
... Consider the superposition postulate of Quantum Mechanics. It leads to the fact that composite quantum systems can be in entangled states, i.e., states that are unfactorizable. In the history of quantum physics, the entanglement is considered and discussed in depth as the main reason of non-locality ...
... Consider the superposition postulate of Quantum Mechanics. It leads to the fact that composite quantum systems can be in entangled states, i.e., states that are unfactorizable. In the history of quantum physics, the entanglement is considered and discussed in depth as the main reason of non-locality ...
Memory cost of quantum contextuality Linköping University Post Print
... contextuality and is in contrast to classical physics, where the answer to a single question does not depend on which other compatible questions are asked at the same time. Contextuality can be seen as complementary to the well-known nonlocality of distributed quantum systems [4]. Both phenomena can ...
... contextuality and is in contrast to classical physics, where the answer to a single question does not depend on which other compatible questions are asked at the same time. Contextuality can be seen as complementary to the well-known nonlocality of distributed quantum systems [4]. Both phenomena can ...
Classical-quantum correspondence and the
... Although the semiclassical po expressions for the quantum level density can in principle be used in the “forward” mode to compute semiclassical eigenvalues for individual levels, in practice there are many difficult issues concerning enumeration of pos and convergence, especially for systems with mixe ...
... Although the semiclassical po expressions for the quantum level density can in principle be used in the “forward” mode to compute semiclassical eigenvalues for individual levels, in practice there are many difficult issues concerning enumeration of pos and convergence, especially for systems with mixe ...
Parity anomaly and spin transmutation in quantum spin Hall
... Josephson junctions in the absence of magnetic impurities [3]. Consider a quantum spin Hall edge with counterpropagating edge modes, placed in between two superconductors whose phases differ by φ. The subgap spectrum of such a Josephson junction as a function of φ is shown in Fig. 1. In the short ju ...
... Josephson junctions in the absence of magnetic impurities [3]. Consider a quantum spin Hall edge with counterpropagating edge modes, placed in between two superconductors whose phases differ by φ. The subgap spectrum of such a Josephson junction as a function of φ is shown in Fig. 1. In the short ju ...
Macroscopic superposition states and decoherence by quantum
... of quantum states. This phenomenon, commonly referred to as decoherence or dephasing, is the subject of the second part of the thesis with the title “Decoherence by quantum telegraph noise”. We have studied the time evolution of the reduced density matrix of a two-level system (qubit) subject to qua ...
... of quantum states. This phenomenon, commonly referred to as decoherence or dephasing, is the subject of the second part of the thesis with the title “Decoherence by quantum telegraph noise”. We have studied the time evolution of the reduced density matrix of a two-level system (qubit) subject to qua ...
Interaction-based nonlinear quantum metrology with a cold atomic ensemble
... Moreover, noise can play a role also at the stage of the interaction between the probe and the system, because of unknown, or not under control, mechanisms, e.g., how the room temperature affects the thermometer while it is measuring. It is crucial to make a distinction between sources of noise. The ...
... Moreover, noise can play a role also at the stage of the interaction between the probe and the system, because of unknown, or not under control, mechanisms, e.g., how the room temperature affects the thermometer while it is measuring. It is crucial to make a distinction between sources of noise. The ...
Carbon nanotube quantum dots on hexagonal boron nitride
... CNTs are not visible using an optical microscope and can only be found by SEM or atomic force microscopy (AFM) imaging, as shown for the same hBN flake in figure 1c and 1d, respectively. Figure 2 shows a series of SEM images of a ~ 1 nm radius CNT on a hBN flake with several steps in the thickness f ...
... CNTs are not visible using an optical microscope and can only be found by SEM or atomic force microscopy (AFM) imaging, as shown for the same hBN flake in figure 1c and 1d, respectively. Figure 2 shows a series of SEM images of a ~ 1 nm radius CNT on a hBN flake with several steps in the thickness f ...
Measurement Models for Quantum Zeno and anti
... pn = |hn|αi|2 to find the system in a state |ni. However, only a basis consisting of states that are not immediately destroyed by decoherence defines “realizable observables”. The usual description of measurements is phenomenological. However, measurements should be described dynamically as interact ...
... pn = |hn|αi|2 to find the system in a state |ni. However, only a basis consisting of states that are not immediately destroyed by decoherence defines “realizable observables”. The usual description of measurements is phenomenological. However, measurements should be described dynamically as interact ...
Quantum computing
Quantum computing studies theoretical computation systems (quantum computers) that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Quantum computers are different from digital computers based on transistors. Whereas digital computers require data to be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits (qubits), which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. Quantum computers share theoretical similarities with non-deterministic and probabilistic computers. The field of quantum computing was initiated by the work of Yuri Manin in 1980, Richard Feynman in 1982, and David Deutsch in 1985. A quantum computer with spins as quantum bits was also formulated for use as a quantum space–time in 1968.As of 2015, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits. Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in an effort to develop quantum computers for civilian, business, trade, and national security purposes, such as cryptanalysis.Large-scale quantum computers will be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm or the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.Given sufficient computational resources, however, a classical computer could be made to simulate any quantum algorithm, as quantum computation does not violate the Church–Turing thesis.